Spence Engineering Company, Inc.
The ET134 temperature/pressure regulators fromSpence Engineering Company, Inc. (Walden, NY) feature cascade control, which is designed to eliminate wide temperature fluctuations by preventing spikes in pressure caused by changes in process load. The unit is available in sizes 3/8- through 12-in. In cast iron and cast steel and is suited for fluid, gas, and vapor applications, especially instantaneous water heaters.
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